255021321053 has 4 divisors (see below), whose sum is σ = 263815159740. Its totient is φ = 246227482368.

The previous prime is 255021321041. The next prime is 255021321073. The reversal of 255021321053 is 350123120552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54623636089 + 200397684964 = 233717^2 + 447658^2 .

It is a cyclic number.

It is not a de Polignac number, because 255021321053 - 2¹⁸ = 255021058909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 8793838657 = 255021321053 / (2 + 5 + 5 + 0 + 2 + 1 + 3 + 2 + 1 + 0 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255021321073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4396919300 + ... + 4396919357.

It is an arithmetic number, because the mean of its divisors is an integer number (65953789935).

Almost surely, 2^255021321053 is an apocalyptic number.

It is an amenable number.

255021321053 is a deficient number, since it is larger than the sum of its proper divisors (8793838687).

255021321053 is an equidigital number, since it uses as much as digits as its factorization.

255021321053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8793838686.

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 255021321053 in words is "two hundred fifty-five billion, twenty-one million, three hundred twenty-one thousand, fifty-three".